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serg [7]
4 years ago
13

Please help me. My homework is due tomorrow.

Mathematics
1 answer:
skelet666 [1.2K]4 years ago
3 0
I think the answer is 9
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Cylinder A has radius r and height h as shown in the diagram. Cylinder B has radius 4r and height 4h. How many times greater is
svetlana [45]

Answer:

  • The surface area of Cylinder B is 16 times the surface area of Cylinder A

Step-by-step explanation:

<u>Note</u>: <em>It is assumed we are looking at  the total surface area (but the answer would be same for both cases)</em>

<h3>Given</h3>

  • Cylinders A with radius - r, height - h,
  • Cylinder B with radius - 4r, height -  4h.

<h3>To find </h3>

  • The ratio of total surface areas of cylinder B to A

<h3>Solution</h3>

Total surface area of cylinder A is:

  • S_A = 2\pi  r(h + r)

Total surface area of cylinder B is:

  • S_B = 2\pi(4r)(4r + 4h) = 8\pi(4)(r + h) = 32\pi(r + h)

Find the ratio of areas:

  • \cfrac{S_B}{S_A} =\cfrac{32\pi(r+h)}{2\pi(r+h)} =16

3 0
3 years ago
Compute the average rate of f(x) from x=1 to x=4 and identify the meaning of that rate?
gogolik [260]
The average rate is:
(f(4) - f(1)) / (4 - 1)

The meaning is how much f(x) changes when x increased by 1.
8 0
3 years ago
Wow...I forgot how to do this please help
Anvisha [2.4K]

Answer:

B. y = -6x+7

Step-by-step explanation:

change in x is positive 6 change in y is negative 1

6/-1 is the slope

-6 is the slope

7 0
3 years ago
At a school pep rally the ratio of students who wore red to those who wore yellow is 7 to 3 their are 300 students at the rally
Serhud [2]
Red to yellow.......7:3....added = 10
so 7/10 of the total students wore red and 3/10 of the total students wore yellow

and there are 300 total students...
7/10(300) = 2100/10 = 210 wore red
3/10(300) = 900/10 = 90 wore yellow

how many more wore red.....(210 - 90) = 120 more students wore red then yellow
5 0
3 years ago
tom had a very challenging fraction multiplycation problem to do, but his sister said it was really easy to do mentally. can you
krok68 [10]

Answer:

76/81×80

76=80/81

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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